1 files changed, 388 insertions, 0 deletions
diff --git a/netwerk/protocol/http/nsHttp.h b/netwerk/protocol/http/nsHttp.h
new file mode 100644
index 0000000000..182e8df9d2
--- /dev/null
+++ b/netwerk/protocol/http/nsHttp.h
@@ -0,0 +1,388 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=4 sw=2 sts=2 et cin: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsHttp_h__
+#define nsHttp_h__
+
+#include <stdint.h>
+#include "prtime.h"
+#include "nsString.h"
+#include "nsError.h"
+#include "nsTArray.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/Tuple.h"
+#include "mozilla/UniquePtr.h"
+
+class nsICacheEntry;
+
+namespace mozilla {
+
+class Mutex;
+
+namespace net {
+class nsHttpResponseHead;
+class nsHttpRequestHead;
+class CacheControlParser;
+
+enum class HttpVersion {
+  UNKNOWN = 0,
+  v0_9 = 9,
+  v1_0 = 10,
+  v1_1 = 11,
+  v2_0 = 20,
+  v3_0 = 30
+};
+
+enum class SpdyVersion { NONE = 0, HTTP_2 = 5 };
+
+extern const uint32_t kHttp3VersionCount;
+extern const nsCString kHttp3Versions[];
+
+//-----------------------------------------------------------------------------
+// http connection capabilities
+//-----------------------------------------------------------------------------
+
+#define NS_HTTP_ALLOW_KEEPALIVE (1 << 0)
+#define NS_HTTP_LARGE_KEEPALIVE (1 << 1)
+
+// a transaction with this caps flag will continue to own the connection,
+// preventing it from being reclaimed, even after the transaction completes.
+#define NS_HTTP_STICKY_CONNECTION (1 << 2)
+
+// a transaction with this caps flag will, upon opening a new connection,
+// bypass the local DNS cache
+#define NS_HTTP_REFRESH_DNS (1 << 3)
+
+// a transaction with this caps flag will not pass SSL client-certificates
+// to the server (see bug #466080), but is may also be used for other things
+#define NS_HTTP_LOAD_ANONYMOUS (1 << 4)
+
+// a transaction with this caps flag keeps timing information
+#define NS_HTTP_TIMING_ENABLED (1 << 5)
+
+// a transaction with this flag blocks the initiation of other transactons
+// in the same load group until it is complete
+#define NS_HTTP_LOAD_AS_BLOCKING (1 << 6)
+
+// Disallow the use of the SPDY protocol. This is meant for the contexts
+// such as HTTP upgrade which are nonsensical for SPDY, it is not the
+// SPDY configuration variable.
+#define NS_HTTP_DISALLOW_SPDY (1 << 7)
+
+// a transaction with this flag loads without respect to whether the load
+// group is currently blocking on some resources
+#define NS_HTTP_LOAD_UNBLOCKED (1 << 8)
+
+// This flag indicates the transaction should accept associated pushes
+#define NS_HTTP_ONPUSH_LISTENER (1 << 9)
+
+// Transactions with this flag should react to errors without side effects
+// First user is to prevent clearing of alt-svc cache on failed probe
+#define NS_HTTP_ERROR_SOFTLY (1 << 10)
+
+// This corresponds to nsIHttpChannelInternal.beConservative
+// it disables any cutting edge features that we are worried might result in
+// interop problems with critical infrastructure
+#define NS_HTTP_BE_CONSERVATIVE (1 << 11)
+
+// Transactions with this flag should be processed first.
+#define NS_HTTP_URGENT_START (1 << 12)
+
+// A sticky connection of the transaction is explicitly allowed to be restarted
+// on ERROR_NET_RESET.
+#define NS_HTTP_CONNECTION_RESTARTABLE (1 << 13)
+
+// Allow re-using a spdy/http2 connection with NS_HTTP_ALLOW_KEEPALIVE not set.
+// This is primarily used to allow connection sharing for websockets over http/2
+// without accidentally allowing it for websockets not over http/2
+#define NS_HTTP_ALLOW_SPDY_WITHOUT_KEEPALIVE (1 << 15)
+
+// Only permit CONNECTing to a proxy. A channel with this flag will not send an
+// http request after CONNECT or setup tls. An http upgrade handler MUST be
+// set. An ALPN header is set using the upgrade protocol.
+#define NS_HTTP_CONNECT_ONLY (1 << 16)
+
+// The connection should not use IPv4.
+#define NS_HTTP_DISABLE_IPV4 (1 << 17)
+
+// The connection should not use IPv6
+#define NS_HTTP_DISABLE_IPV6 (1 << 18)
+
+// Encodes the TRR mode.
+#define NS_HTTP_TRR_MODE_MASK ((1 << 19) | (1 << 20))
+
+// The connection could bring the peeked data for sniffing
+#define NS_HTTP_CALL_CONTENT_SNIFFER (1 << 21)
+
+// Disallow the use of the HTTP3 protocol. This is meant for the contexts
+// such as HTTP upgrade which are not supported by HTTP3.
+#define NS_HTTP_DISALLOW_HTTP3 (1 << 22)
+
+// Force a transaction to stay in pending queue until the HTTPSSVC record is
+// available.
+#define NS_HTTP_WAIT_HTTPSSVC_RESULT (1 << 23)
+
+#define NS_HTTP_TRR_FLAGS_FROM_MODE(x) ((static_cast<uint32_t>(x) & 3) << 19)
+
+#define NS_HTTP_TRR_MODE_FROM_FLAGS(x) \
+  (static_cast<nsIRequest::TRRMode>((((x)&NS_HTTP_TRR_MODE_MASK) >> 19) & 3))
+
+//-----------------------------------------------------------------------------
+// some default values
+//-----------------------------------------------------------------------------
+
+#define NS_HTTP_DEFAULT_PORT 80
+#define NS_HTTPS_DEFAULT_PORT 443
+
+#define NS_HTTP_HEADER_SEP ','
+
+//-----------------------------------------------------------------------------
+// http atoms...
+//-----------------------------------------------------------------------------
+
+struct nsHttpAtom {
+  nsHttpAtom() : _val(nullptr){};
+  explicit nsHttpAtom(const char* val) : _val(val) {}
+  nsHttpAtom(const nsHttpAtom& other) = default;
+
+  operator const char*() const { return _val; }
+  const char* get() const { return _val; }
+
+  void operator=(const char* v) { _val = v; }
+  void operator=(const nsHttpAtom& a) { _val = a._val; }
+
+  // private
+  const char* _val;
+};
+
+namespace nsHttp {
+[[nodiscard]] nsresult CreateAtomTable();
+void DestroyAtomTable();
+
+// The mutex is valid any time the Atom Table is valid
+// This mutex is used in the unusual case that the network thread and
+// main thread might access the same data
+Mutex* GetLock();
+
+// will dynamically add atoms to the table if they don't already exist
+nsHttpAtom ResolveAtom(const char*);
+inline nsHttpAtom ResolveAtom(const nsACString& s) {
+  return ResolveAtom(PromiseFlatCString(s).get());
+}
+
+// returns true if the specified token [start,end) is valid per RFC 2616
+// section 2.2
+bool IsValidToken(const char* start, const char* end);
+
+inline bool IsValidToken(const nsACString& s) {
+  return IsValidToken(s.BeginReading(), s.EndReading());
+}
+
+// Strip the leading or trailing HTTP whitespace per fetch spec section 2.2.
+void TrimHTTPWhitespace(const nsACString& aSource, nsACString& aDest);
+
+// Returns true if the specified value is reasonable given the defintion
+// in RFC 2616 section 4.2.  Full strict validation is not performed
+// currently as it would require full parsing of the value.
+bool IsReasonableHeaderValue(const nsACString& s);
+
+// find the first instance (case-insensitive comparison) of the given
+// |token| in the |input| string.  the |token| is bounded by elements of
+// |separators| and may appear at the beginning or end of the |input|
+// string.  null is returned if the |token| is not found.  |input| may be
+// null, in which case null is returned.
+const char* FindToken(const char* input, const char* token,
+                      const char* separators);
+
+// This function parses a string containing a decimal-valued, non-negative
+// 64-bit integer.  If the value would exceed INT64_MAX, then false is
+// returned.  Otherwise, this function returns true and stores the
+// parsed value in |result|.  The next unparsed character in |input| is
+// optionally returned via |next| if |next| is non-null.
+//
+// TODO(darin): Replace this with something generic.
+//
+[[nodiscard]] bool ParseInt64(const char* input, const char** next,
+                              int64_t* result);
+
+// Variant on ParseInt64 that expects the input string to contain nothing
+// more than the value being parsed.
+[[nodiscard]] inline bool ParseInt64(const char* input, int64_t* result) {
+  const char* next;
+  return ParseInt64(input, &next, result) && *next == '\0';
+}
+
+// Return whether the HTTP status code represents a permanent redirect
+bool IsPermanentRedirect(uint32_t httpStatus);
+
+// Returns the APLN token which represents the used protocol version.
+const char* GetProtocolVersion(HttpVersion pv);
+
+bool ValidationRequired(bool isForcedValid,
+                        nsHttpResponseHead* cachedResponseHead,
+                        uint32_t loadFlags, bool allowStaleCacheContent,
+                        bool isImmutable, bool customConditionalRequest,
+                        nsHttpRequestHead& requestHead, nsICacheEntry* entry,
+                        CacheControlParser& cacheControlRequest,
+                        bool fromPreviousSession,
+                        bool* performBackgroundRevalidation = nullptr);
+
+nsresult GetHttpResponseHeadFromCacheEntry(
+    nsICacheEntry* entry, nsHttpResponseHead* cachedResponseHead);
+
+nsresult CheckPartial(nsICacheEntry* aEntry, int64_t* aSize,
+                      int64_t* aContentLength,
+                      nsHttpResponseHead* responseHead);
+
+void DetermineFramingAndImmutability(nsICacheEntry* entry,
+                                     nsHttpResponseHead* cachedResponseHead,
+                                     bool isHttps, bool* weaklyFramed,
+                                     bool* isImmutable);
+
+// Called when an optimization feature affecting active vs background tab load
+// took place.  Called only on the parent process and only updates
+// mLastActiveTabLoadOptimizationHit timestamp to now.
+void NotifyActiveTabLoadOptimization();
+TimeStamp const GetLastActiveTabLoadOptimizationHit();
+void SetLastActiveTabLoadOptimizationHit(TimeStamp const& when);
+bool IsBeforeLastActiveTabLoadOptimization(TimeStamp const& when);
+
+// Declare all atoms
+//
+// The atom names and values are stored in nsHttpAtomList.h and are brought
+// to you by the magic of C preprocessing.  Add new atoms to nsHttpAtomList
+// and all support logic will be auto-generated.
+//
+#define HTTP_ATOM(_name, _value) extern nsHttpAtom _name;
+#include "nsHttpAtomList.h"
+#undef HTTP_ATOM
+
+nsCString ConvertRequestHeadToString(nsHttpRequestHead& aRequestHead,
+                                     bool aHasRequestBody,
+                                     bool aRequestBodyHasHeaders,
+                                     bool aUsingConnect);
+
+template <typename T>
+using SendFunc = std::function<bool(const T&, uint64_t, uint32_t)>;
+
+template <typename T>
+bool SendDataInChunks(const nsCString& aData, uint64_t aOffset, uint32_t aCount,
+                      const SendFunc<T>& aSendFunc) {
+  static uint32_t const kCopyChunkSize = 128 * 1024;
+  uint32_t toRead = std::min<uint32_t>(aCount, kCopyChunkSize);
+
+  uint32_t start = 0;
+  while (aCount) {
+    T data(Substring(aData, start, toRead));
+
+    if (!aSendFunc(data, aOffset, toRead)) {
+      return false;
+    }
+
+    aOffset += toRead;
+    start += toRead;
+    aCount -= toRead;
+    toRead = std::min<uint32_t>(aCount, kCopyChunkSize);
+  }
+
+  return true;
+}
+
+}  // namespace nsHttp
+
+//-----------------------------------------------------------------------------
+// utilities...
+//-----------------------------------------------------------------------------
+
+static inline uint32_t PRTimeToSeconds(PRTime t_usec) {
+  return uint32_t(t_usec / PR_USEC_PER_SEC);
+}
+
+#define NowInSeconds() PRTimeToSeconds(PR_Now())
+
+// Round q-value to 2 decimal places; return 2 most significant digits as uint.
+#define QVAL_TO_UINT(q) ((unsigned int)((q + 0.005) * 100.0))
+
+#define HTTP_LWS " \t"
+#define HTTP_HEADER_VALUE_SEPS HTTP_LWS ","
+
+void EnsureBuffer(UniquePtr<char[]>& buf, uint32_t newSize, uint32_t preserve,
+                  uint32_t& objSize);
+void EnsureBuffer(UniquePtr<uint8_t[]>& buf, uint32_t newSize,
+                  uint32_t preserve, uint32_t& objSize);
+
+// h2=":443"; ma=60; single
+// results in 3 mValues = {{h2, :443}, {ma, 60}, {single}}
+
+class ParsedHeaderPair {
+ public:
+  ParsedHeaderPair(const char* name, int32_t nameLen, const char* val,
+                   int32_t valLen, bool isQuotedValue);
+
+  ParsedHeaderPair(ParsedHeaderPair const& copy)
+      : mName(copy.mName),
+        mValue(copy.mValue),
+        mUnquotedValue(copy.mUnquotedValue),
+        mIsQuotedValue(copy.mIsQuotedValue) {
+    if (mIsQuotedValue) {
+      mValue.Rebind(mUnquotedValue.BeginReading(), mUnquotedValue.Length());
+    }
+  }
+
+  nsDependentCSubstring mName;
+  nsDependentCSubstring mValue;
+
+ private:
+  nsCString mUnquotedValue;
+  bool mIsQuotedValue;
+
+  void RemoveQuotedStringEscapes(const char* val, int32_t valLen);
+};
+
+class ParsedHeaderValueList {
+ public:
+  ParsedHeaderValueList(const char* t, uint32_t len, bool allowInvalidValue);
+  nsTArray<ParsedHeaderPair> mValues;
+
+ private:
+  void ParseNameAndValue(const char* input, bool allowInvalidValue);
+};
+
+class ParsedHeaderValueListList {
+ public:
+  // RFC 7231 section 3.2.6 defines the syntax of the header field values.
+  // |allowInvalidValue| indicates whether the rule will be used to check
+  // the input text.
+  // Note that ParsedHeaderValueListList is currently used to parse
+  // Alt-Svc and Server-Timing header. |allowInvalidValue| is set to true
+  // when parsing Alt-Svc for historical reasons.
+  explicit ParsedHeaderValueListList(const nsCString& txt,
+                                     bool allowInvalidValue = true);
+  nsTArray<ParsedHeaderValueList> mValues;
+
+ private:
+  nsCString mFull;
+};
+
+void LogHeaders(const char* lineStart);
+
+// Convert HTTP response codes returned by a proxy to nsresult.
+// This function should be only used when we get a failed response to the
+// CONNECT method.
+nsresult HttpProxyResponseToErrorCode(uint32_t aStatusCode);
+
+// Given a list of alpn-id, this function returns a supported alpn-id. If both
+// h3 and h2 are enabled, h3 alpn is preferred. This function returns a
+// Tuple<alpn-id, isHttp3>. The first element is the alpn-id and the second one
+// is a boolean to indicate if this alpn-id is for http3. If no supported
+// alpn-id is found, the first element would be a n empty string.
+Tuple<nsCString, bool> SelectAlpnFromAlpnList(
+    const nsTArray<nsCString>& aAlpnList, bool aNoHttp2, bool aNoHttp3);
+
+}  // namespace net
+}  // namespace mozilla
+
+#endif  // nsHttp_h__